When they made this particular hero
They didn't give him a gun 
They gave him a screwdriver to fix things.
They didn't give him a tank or a warship or an X-wing fighter
They gave him a call box from wich you can call for help.
And they didn't give him a superpower or pointy ears or a heat ray
They gave him an extra heart.
They gave him two hearts.
And that's an extraordinary thing.
There will never come a time when we don't need a hero like the DOCTOR.